JPH1138153A - Buried object-detecting device - Google Patents
Buried object-detecting deviceInfo
- Publication number
- JPH1138153A JPH1138153A JP19699997A JP19699997A JPH1138153A JP H1138153 A JPH1138153 A JP H1138153A JP 19699997 A JP19699997 A JP 19699997A JP 19699997 A JP19699997 A JP 19699997A JP H1138153 A JPH1138153 A JP H1138153A
- Authority
- JP
- Japan
- Prior art keywords
- vibration sensor
- buried object
- vibration
- earth
- earth auger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Earth Drilling (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、掘削機械に用いら
れる地中埋設物の探知に係り、特にアースオーガなどの
掘削機械による既設地中埋設物の衝突破損事故を防止す
るための埋設物探知装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the detection of an underground object used in an excavating machine, and more particularly to the detection of an underground object to prevent a collision damage of an existing underground object by an excavating machine such as an earth auger. Related to the device.
【０００２】[0002]
【従来の技術】電柱類の設置工事では、穴掘削作業を機
械で行う場合、穴掘り建柱機（アースオーガ）等が使用
されている。しかし、近年、特に都市部においては、通
信ケーブルの他、ガス、水道、電力等のライフライン用
の地中埋設物が輻輳している状況にあり、これらのほと
んどが地中２ｍ以内の深さに存在するため、穴掘り建柱
機による衝突破損事故がしばしば起きている。2. Description of the Related Art In the installation work of electric poles, when a hole excavation operation is performed by a machine, a hole excavator (earth auger) or the like is used. However, in recent years, especially in urban areas, in addition to communication cables, underground objects for lifelines such as gas, water, and electric power have been congested, and most of them have a depth of 2 m or less underground. As a result, collision damage accidents are often caused by digging poles.
【０００３】従来、このような地中埋設物への衝突破損
事故を防止するための方法として、回転部の先端部に掘
削刃と当該掘削刃より下方に下端周縁部を所定ピッチの
波状に形成した円筒形ケーシングを有し、かつ、回転軸
内に振動センサを内蔵した穴掘り建柱機で、ドリルの回
転数と円筒形ケージングの下端周縁部の１周あたりの波
数から地中埋設物との接触時に発生する振動の基本周波
数を求め、その基本周波数のスペクトル強度が所定の判
定レベルよりも大きい場合に地中埋設物を探知したと判
定する方法があった。[0003] Conventionally, as a method for preventing such an accident of damage due to collision with an underground object, an excavating blade is formed at the tip of a rotating part and a lower peripheral edge is formed below the excavating blade in a wavy shape having a predetermined pitch. With a cylindrical casing, and a drilling machine with a built-in vibration sensor in the rotating shaft, with the number of rotations of the drill and the number of waves per round of the lower edge of the cylindrical caging, the underground buried object There is a method in which a fundamental frequency of vibration generated at the time of contact is determined, and when the spectral intensity of the fundamental frequency is higher than a predetermined determination level, it is determined that an underground object is detected.
【０００４】図２にアースオーガの構成を示す。図にお
いて、１はアースオーガの回転軸、２は回転軸１に沿っ
て設けられた排土用の螺旋状ブレード、３は回転軸１の
先端部に設けられた掘削刃、４は螺旋状ブレード２の外
周部に掘削刃３より下方に設けられ下端周縁部を所定ピ
ッチの波状に形成した円筒形ケーシング。５は上下方向
の振動を測定する振動センサで、円筒形ケーシング４の
内壁に固定されている。６は振動センサ５から受信した
信号を周波数解析する周波数解析装置を示す。７は振動
センサ５と周波数解析装置６を電気的に接続する信号ケ
ーブルである。この方式による埋設物探知は、アースオ
ーガで掘削中に埋設物が存在した場合、円筒形ケーシン
グ４の波形構造によって接触時の上下方向の振動加速度
をセンサ５で検知し、このセンサ５の検知信号を信号ケ
ーブル７を介して周波数解析装置６に伝送し、この周波
数解析装置６で周波数を解析して地中埋設物を探知した
と判定する。FIG. 2 shows the structure of an earth auger. In the drawing, 1 is a rotating shaft of an earth auger, 2 is a helical blade for discharging soil provided along the rotating shaft 1, 3 is a digging blade provided at the tip of the rotating shaft 1, 4 is a helical blade 2. A cylindrical casing which is provided below the excavation blade 3 on the outer peripheral portion of the casing 2 and has a lower peripheral portion formed in a wavy shape at a predetermined pitch. Reference numeral 5 denotes a vibration sensor for measuring the vibration in the vertical direction, which is fixed to the inner wall of the cylindrical casing 4. Reference numeral 6 denotes a frequency analysis device that performs frequency analysis on a signal received from the vibration sensor 5. Reference numeral 7 denotes a signal cable for electrically connecting the vibration sensor 5 and the frequency analyzer 6. When a buried object is present during excavation with an earth auger, a vertical vibration acceleration at the time of contact is detected by the sensor 5 by the waveform structure of the cylindrical casing 4, and the detection signal of the sensor 5 is detected. Is transmitted to the frequency analysis device 6 via the signal cable 7, and the frequency analysis device 6 analyzes the frequency to determine that an underground object is detected.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、振動セ
ンサを円筒形ケーシングの内壁に備えると振動センサか
ら得られた検知信号を周波数解析装置に伝送するための
信号ケーブルを配線する必要がある。そのためには、信
号ケーブルをアースオーガの回転軸内に配線する、もし
くは、回転軸に沿って設けられた排土用の螺旋状ブレー
ドに沿って信号ケーブルを巻きつける必要がある。前者
については、アースオーガを伸縮する際の心棒がある場
合は配線が不可能であり、後者の場合は、排土や石・礫
に接触するため、信号ケーブルを傷つける、という問題
があった。However, if the vibration sensor is provided on the inner wall of the cylindrical casing, it is necessary to wire a signal cable for transmitting a detection signal obtained from the vibration sensor to the frequency analyzer. For this purpose, it is necessary to wire the signal cable in the rotation axis of the earth auger, or to wind the signal cable along a helical blade for earth removal provided along the rotation axis. In the former case, there is a problem that the wiring is impossible if there is a mandrel for expanding and contracting the earth auger, and in the latter case, the signal cable is damaged because it comes in contact with earth removal and stones and gravel.
【０００６】また、振動センサを円筒形ケーシング内壁
に設置することは手間がかかり、振動センサ固定のため
のスペースが掘削した際の排出される土の排土能率を低
下させるという問題があった。また、地下水等が多い場
合には振動センサが浸水し、故障する危険性があった。Further, installing the vibration sensor on the inner wall of the cylindrical casing is troublesome, and there is a problem in that the space for fixing the vibration sensor reduces the soil discharging efficiency when excavated when excavating. Also, when there is a lot of groundwater or the like, there is a risk that the vibration sensor will be flooded and break down.
【０００７】以上のように、信号ケーブルについては、
信号ケーブルをアースオーガの回転軸内に配線する、も
しくは、回転軸に沿って設けられた螺旋状ブレードに沿
って巻きつけて配線することを避ける方法と、振動セン
サについては、振動センサを円筒形ケーシング内壁に設
置しない方法が従来より望まれていた。As described above, regarding the signal cable,
A method of avoiding wiring the signal cable inside the rotation axis of the earth auger, or wrapping it around the spiral blade provided along the rotation axis, and using a cylindrical vibration sensor for the vibration sensor There has been a demand for a method that is not provided on the inner wall of the casing.
【０００８】本発明は上記の事情に鑑みてなされたもの
で、振動センサから探知ユニットまでの信号ケーブルの
配線を改善し得、アースオーガの排土能率を向上し得、
さらに、センサの防水機能を高めることを実現し得る埋
設物探知装置を提供することを目的とする。[0008] The present invention has been made in view of the above circumstances, can improve the wiring of the signal cable from the vibration sensor to the detection unit, can improve the earth discharging efficiency of the earth auger,
It is another object of the present invention to provide a buried object detection device capable of realizing a higher waterproof function of the sensor.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するため
に本発明の埋設物探知装置は、アースオーガの回転軸の
先端部に設けられた掘削刃と該掘削刃より下端周縁部を
波状に形成した円筒形ケーシングと、前記円筒形ケーシ
ングの下端周縁部が埋設物との接触時に発生する振動を
検出して埋設物と判定する埋設物検出判定部とを備えた
埋設物探知装置において、前記振動を検出する振動セン
サをアースオーガの排土用螺旋状ブレードより上部に設
けたことを特徴とするものである。In order to achieve the above object, a buried object detecting device according to the present invention comprises a digging blade provided at a tip portion of a rotating shaft of an earth auger and a lower end peripheral edge portion of the digging blade. A buried object detection device comprising: a formed cylindrical casing; and a buried object detection / determination unit that detects a vibration generated when a lower peripheral portion of the cylindrical casing comes into contact with the buried object to determine the buried object. A vibration sensor for detecting vibration is provided above the earth discharging helical blade of the earth auger.
【００１０】また本発明は前記埋設物探知装置におい
て、前記振動センサは出力を無線送信する送信部を一体
として具備し、前記振動センサの出力を無線受信する受
信部と前記受信部で受信した信号を解析する解析手段を
備えたことを特徴とするものである。According to the present invention, in the device for detecting an object to be buried, the vibration sensor integrally includes a transmitting unit for wirelessly transmitting an output, a receiving unit for wirelessly receiving the output of the vibration sensor, and a signal received by the receiving unit. Characterized in that it comprises an analyzing means for analyzing.
【００１１】また本発明は前記埋設物探知装置におい
て、前記振動センサにＩＣ型振動センサを用いたことを
特徴とするものである。上記手段により本発明は、ＩＣ
型振動センサを用いることにより、上下方向の振動のみ
を検出し、水平方向の振動を検出しないので、振動セン
サをアースオーガの排土用螺旋状ブレードより上部に備
えることが可能であり、無線伝送が可能となる。そのた
め、振動センサから探知ユニットに伝送するための信号
ケーブルを撤廃することが可能である。加えて、円筒形
ケーシング内壁の振動センサのスペースをなくすことが
可能なため、排土能率を高めることが可能である。ま
た、振動センサと無線送信機を一体化することにより、
アースオーガへ取り付ける作業性を向上することが可能
である。Further, the present invention is characterized in that in the buried object detecting device, an IC type vibration sensor is used as the vibration sensor. By the above means, the present invention provides an IC
By using a vibration sensor, only vertical vibrations are detected and horizontal vibrations are not detected.Therefore, it is possible to provide a vibration sensor above the helical blade for discharging the earth auger, and wireless transmission Becomes possible. Therefore, it is possible to eliminate the signal cable for transmitting from the vibration sensor to the detection unit. In addition, since the space for the vibration sensor on the inner wall of the cylindrical casing can be eliminated, the earth discharging efficiency can be increased. Also, by integrating the vibration sensor and the wireless transmitter,
It is possible to improve the workability of attaching to the earth auger.
【００１２】[0012]
【発明の実施の形態】以下、図面を参照して本発明の実
施の形態例を詳細に説明する。図１は、本発明の一実施
形態例におけるアースオーガの正面概略図である。図に
おいて、１はアースオーガの回転軸、２は回転軸１に沿
って設けられたアースオーガの排土用螺旋状ブレード、
３は回転軸１の先端部に設けられた掘削刃、４は回転軸
１の先端部に設けられ掘削刃３より下端周縁部を所定ピ
ッチの波状に形成した円筒形ケーシング、８は回転軸１
の排土用螺旋状ブレード２より上部に設けられ振動を検
出するＩＣ型振動センサ、９は無線送信機、１０は無線
受信機を組み込んだ探知ユニット、１１は通信ケーブル
等の地中埋設物である。ＩＣ型振動センサ８は無線送信
機９に組み込まれており、一体構造になっている。Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic front view of an earth auger according to an embodiment of the present invention. In the drawing, 1 is a rotation axis of the earth auger, 2 is a spiral blade for discharging the earth auger provided along the rotation axis 1,
Reference numeral 3 denotes a drilling blade provided at the tip of the rotary shaft 1, 4 denotes a cylindrical casing provided at the tip of the rotary shaft 1, and a lower edge of the drilling blade 3 is formed in a wavy shape having a predetermined pitch, and 8 denotes a rotary shaft 1.
An IC type vibration sensor provided above the spiral blade 2 for discharging soil to detect vibration, 9 is a wireless transmitter, 10 is a detection unit incorporating a wireless receiver, and 11 is an underground object such as a communication cable. is there. The IC type vibration sensor 8 is incorporated in the wireless transmitter 9 and has an integrated structure.
【００１３】本発明の一実施形態例として示した図１の
ようなアースオーガを用いた場合、地中埋設物探知の手
順は次のようになる。すなわち、アースオーガが穴掘削
中に埋設物１１と接触した場合は、先ず、円筒形ケーシ
ング４の下端周縁部が地中埋設物１１と接触することに
より、波状の円筒形ケーシング４が上下振動することに
より、アースオーガの回転軸１が上下振動し、その上下
振動をＩＣ型振動センサ８が検知し、このＩＣ型振動セ
ンサ８の検知信号を無線送信機９により探知ユニット１
０に伝送する。探知ユニット１０は一体化した無線受信
機でＩＣ型振動センサ８からの検知信号を受信し、受信
して得られた信号を周波数解析し、周波数スペクトルの
強度変化から埋設物を判定し、埋設物に致命的な損傷を
与えずに検知する。When an earth auger as shown in FIG. 1 is used as an embodiment of the present invention, the procedure for detecting an object buried underground is as follows. That is, when the earth auger comes into contact with the buried object 11 during the excavation of the hole, first, the peripheral edge of the lower end of the cylindrical casing 4 comes into contact with the underground buried object 11, so that the wavy cylindrical casing 4 vibrates up and down. As a result, the rotating shaft 1 of the earth auger vibrates up and down, and the up-and-down vibration is detected by the IC-type vibration sensor 8, and the detection signal of the IC-type vibration sensor 8 is detected by the wireless transmitter 9 by the detection unit 1.
Transmit to 0. The detection unit 10 receives a detection signal from the IC type vibration sensor 8 with an integrated wireless receiver, performs frequency analysis of the received signal, determines a buried object from a change in the intensity of the frequency spectrum, and determines the buried object. Detection without causing fatal damage.
【００１４】以上述べたように、ＩＣ型振動センサは上
下方向の振動のみ検知することが可能なので、アースオ
ーガの回転軸に沿って排土用の螺旋状ブレードより上部
に固定することが可能である。そのため、振動センサを
埋設物と接触する円筒形ケーシングの内壁に固定する場
合と比較して、振動センサから無線送信機、もしくは接
続用スリップリングまで配線する信号ケーブルが不必要
になり、作業性を大幅に向上することが可能である。ま
た、円筒形ケーシング内壁に振動センサを固定する必要
がないため、掘削された土の排土能率を高めることが可
能である。さらに、振動センサが螺旋状ブレードの上部
に位置することにより、浸水する危険性がないので、故
障に対する信頼性も高い。このように、本発明によれ
ば、掘削作業の自動化技術において、より効率的な掘削
作業、埋設物の破損防止及び信頼性の高い埋設探知の実
現が期待できる。As described above, since the IC type vibration sensor can detect only vibration in the vertical direction, it can be fixed above the helical blade for discharging along the rotation axis of the earth auger. is there. Therefore, compared to the case where the vibration sensor is fixed to the inner wall of the cylindrical casing that comes into contact with the object to be buried, a signal cable for wiring from the vibration sensor to the wireless transmitter or the connection slip ring becomes unnecessary, and workability is improved. It can be greatly improved. In addition, since it is not necessary to fix the vibration sensor to the inner wall of the cylindrical casing, it is possible to increase the earth discharging efficiency of the excavated soil. Furthermore, since the vibration sensor is located on the upper part of the spiral blade, there is no danger of flooding, so that the reliability for failure is high. As described above, according to the present invention, in the technology for automating excavation work, more efficient excavation work, prevention of breakage of a buried object, and realization of highly reliable burying detection can be expected.
【００１５】[0015]
【発明の効果】以上述べたように本発明によれば、振動
センサから探知ユニットまでの信号ケーブルの配線を改
善でき、アースオーガの排土能率を向上でき、さらに、
センサの防水機能を高めることを実現できる埋設物探知
装置を提供することができる。As described above, according to the present invention, the wiring of the signal cable from the vibration sensor to the detection unit can be improved, and the earth discharging efficiency of the earth auger can be improved.
It is possible to provide a buried object detection device capable of improving the waterproof function of the sensor.
【図１】本発明の一実施形態例に係る埋設物探知装置を
示す構成説明図である。FIG. 1 is an explanatory diagram illustrating a configuration of a buried object detection device according to an embodiment of the present invention.
【図２】従来の埋設物探知装置を示す構成説明図であ
る。FIG. 2 is a configuration explanatory view showing a conventional embedded object detection device.
１…アースオーガの回転軸、２…螺旋状ブレード、３…
掘削刃、４…円筒形ケーシング、５…振動センサ、６…
周波数解析装置、７…信号ケーブル、８…ＩＣ型振動セ
ンサ、９…無線送信機、１０…無線受信機組み込み探知
ユニット、１１…埋設物。1. Rotating shaft of earth auger 2. Helical blade 3.
Drilling blade, 4 ... cylindrical casing, 5 ... vibration sensor, 6 ...
Frequency analysis device, 7: signal cable, 8: IC type vibration sensor, 9: radio transmitter, 10: radio receiver built-in detection unit, 11: embedded object.
Claims (3)
れた掘削刃と該掘削刃より下端周縁部を波状に形成した
円筒形ケーシングと、前記円筒形ケーシングの下端周縁
部が埋設物との接触時に発生する振動を検出して埋設物
と判定する埋設物検出判定部とを備えた埋設物探知装置
において、前記振動を検出する振動センサをアースオー
ガの排土用螺旋状ブレードより上部に設けたことを特徴
とする埋設物探知装置。1. An excavating blade provided at a tip of a rotating shaft of an earth auger, a cylindrical casing having a lower peripheral edge formed in a wavy shape from the excavating blade, and a lower peripheral edge of the cylindrical casing having an embedded object. In a buried object detection device including a buried object detection determination unit that detects vibration generated at the time of contact and determines that the object is a buried object, a vibration sensor for detecting the vibration is provided above a helical blade for discharging earth of an earth auger. A device for detecting a buried object.
信部を一体として具備し、前記振動センサの出力を無線
受信する受信部と前記受信部で受信した信号を解析する
解析手段を備えたことを特徴とする請求項１記載の埋設
物探知装置。2. The vibration sensor according to claim 1, further comprising: a transmission unit configured to wirelessly transmit an output of the vibration sensor; a reception unit configured to wirelessly receive an output of the vibration sensor; and an analysis unit configured to analyze a signal received by the reception unit. The buried object detection device according to claim 1, characterized in that:
いたことを特徴とする請求項１または２記載の埋設物探
知装置。3. An apparatus according to claim 1, wherein an IC type vibration sensor is used as said vibration sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19699997A JPH1138153A (en) | 1997-07-23 | 1997-07-23 | Buried object-detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19699997A JPH1138153A (en) | 1997-07-23 | 1997-07-23 | Buried object-detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH1138153A true JPH1138153A (en) | 1999-02-12 |
Family
ID=16367143
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19699997A Pending JPH1138153A (en) | 1997-07-23 | 1997-07-23 | Buried object-detecting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH1138153A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007284910A (en) * | 2006-04-13 | 2007-11-01 | Tokyo Gas Co Ltd | Drilling device and drilling method for investigating buried metal object |
| JP2012072573A (en) * | 2010-09-28 | 2012-04-12 | Nihon Techno Co Ltd | Drilling head and drilling device |
| JP2021113423A (en) * | 2020-01-17 | 2021-08-05 | 鹿島建設株式会社 | Underground obstacle detection method, and method for installing steel pipe into underground |
| WO2023233549A1 (en) * | 2022-05-31 | 2023-12-07 | 日本電信電話株式会社 | Hole drilling method for erecting poles |
-
1997
- 1997-07-23 JP JP19699997A patent/JPH1138153A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007284910A (en) * | 2006-04-13 | 2007-11-01 | Tokyo Gas Co Ltd | Drilling device and drilling method for investigating buried metal object |
| JP4717690B2 (en) * | 2006-04-13 | 2011-07-06 | 東京瓦斯株式会社 | Drilling device for investigating buried metal and survey drilling method |
| JP2012072573A (en) * | 2010-09-28 | 2012-04-12 | Nihon Techno Co Ltd | Drilling head and drilling device |
| JP2021113423A (en) * | 2020-01-17 | 2021-08-05 | 鹿島建設株式会社 | Underground obstacle detection method, and method for installing steel pipe into underground |
| WO2023233549A1 (en) * | 2022-05-31 | 2023-12-07 | 日本電信電話株式会社 | Hole drilling method for erecting poles |
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